Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

The nonstop is quickest: JetBlue ONT → JFK (5h 22m), on time 7 times in 10. Delta via Atlanta (9h 00m) is more reliable, 87%, but takes 3h 38m longer.

Nonstops (seasonal or thin)


JetBlue	ONT	JFK	5h 22m	72%	1.8%	165	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach New York on time. Total trip = scheduled departure to arrival, layover included (New York is 3 h ahead of Ontario). Layovers up to 4 hours. Pick a connection for the details.


Alaska + Deltatwo ticketsDetails →	ONT 17:32 → PDX 19:49AS 2456 · flown by Horizon	2h 46m Portland	PDX 22:35 → JFK 06:55 +1DL 2139	10h 23m	98%	88%
Delta Details →	ONT 22:00 → ATL 05:18DL 2892	2h 26m Atlanta	ATL 07:44 → JFK 10:00 +1DL 2420	9h 00m	100%	87%
Southwest + Deltatwo ticketsDetails →	ONT 17:15 → PHX 18:35WN 3159	4h 00m Phoenix	PHX 22:35 → JFK 06:27 +1DL 548	10h 12m	97%	85%
Delta Details →	ONT 17:21 → SLC 20:17DL 4443 · flown by SkyWest	3h 42m Salt Lake City	SLC 23:59 → JFK 06:23 +1DL 705	10h 02m	96%	84%
Southwest + Deltatwo ticketsDetails →	ONT 05:30 → LAS 06:35WN 3150	3h 00m Las Vegas	LAS 09:35 → JFK 17:59DL 333	9h 27m	100%	84%
Alaska Details →	ONT 07:00 → PDX 09:15AS 345	1h 32m Portland	PDX 10:47 → JFK 19:23AS 18	9h 23m	100%	82%
Southwest + Americantwo ticketsDetails →	ONT 05:15 → PHX 06:30WN 864	2h 47m Phoenix	PHX 09:17 → JFK 17:29AA 2689	9h 15m	98%	82%
Southwest + Deltatwo ticketsDetails →	ONT 05:50 → DEN 09:05WN 3144	3h 05m Denver	DEN 12:10 → JFK 18:25DL 532	9h 38m	100%	81%
Tight connection: often missed
American Details →	ONT 19:15 → PHX 20:36AA 2639	1h 14m Phoenix	PHX 21:50 → JFK 05:47 +1AA 1587	7h 32m	68%	59%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

SLC · 1h 09m · leaves 06:00 3%

DFW · 1h 05m · leaves 05:34 10%

Afternoon and evening

ATL · 1h 19m · leaves 11:50 9%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON